Takubo, Kou ORCID: 0000-0002-2591-1244, Man, Huiyuan, Nakatsuji, Satoru, Yamamoto, Kohei ORCID: 0000-0002-4270-6410, Zhang, Yujun, Hirata, Yasuyuki, Wadati, Hiroki ORCID: 0000-0001-5969-8624, Yasui, Akira, Mizokawa, Takashi ORCID: 0000-0002-7682-2348 and Khomskii, Daniel, I (2021). Spin-orbital liquid in Ba3CuSb2O9 stabilized by oxygen holes. Phys. Rev. Mater., 5 (7). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2475-9953

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Abstract

We report x-ray and optical absorption spectroscopy as well as hard x-ray photoemission spectroscopy on hexagonal Ba3CuSb2O9 in which a Cu 3d spin-orbital liquid state is suggested from absence of the Jahn-Teller distortion of Cu2+O6 octahedra and of the magnetic ordering. The experimental results and their cluster model analysis indicate that O 2p holes play a crucial role in realizing the spin-orbital liquid state of hexagonal Ba3CuSb2O9. These oxygen holes appear due to the reaction Sb5+ -> Sb3+ + two O 2p holes, with these holes being able to attach to Cu ions. The present work opens avenues towards spin-charge-orbital entangled liquid state in transition-metal oxides with small or negative charge transfer energy.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Takubo, KouUNSPECIFIEDorcid.org/0000-0002-2591-1244UNSPECIFIED
Man, HuiyuanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nakatsuji, SatoruUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yamamoto, KoheiUNSPECIFIEDorcid.org/0000-0002-4270-6410UNSPECIFIED
Zhang, YujunUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hirata, YasuyukiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wadati, HirokiUNSPECIFIEDorcid.org/0000-0001-5969-8624UNSPECIFIED
Yasui, AkiraUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mizokawa, TakashiUNSPECIFIEDorcid.org/0000-0002-7682-2348UNSPECIFIED
Khomskii, Daniel, IUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-595791
DOI: 10.1103/PhysRevMaterials.5.075002
Journal or Publication Title: Phys. Rev. Mater.
Volume: 5
Number: 7
Date: 2021
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 2475-9953
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
TRANSITION; STATES; ORDERMultiple languages
Materials Science, MultidisciplinaryMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/59579

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